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Title: The fraternal WIMP miracle

Abstract

We identify and analyze thermal dark matter candidates in the fraternal twin Higgs model and its generalizations. The relic abundance of fraternal twin dark matter is set by twin weak interactions, with a scale tightly tied to the weak scale of the Standard Model by naturalness considerations. As such, the dark matter candidates benefit from a "fraternal WIMP miracle'', reproducing the observed dark matter abundance for dark matter masses between 50 and 150 GeV . However, the couplings dominantly responsible for dark matter annihilation do not lead to interactions with the visible sector. The direct detection rate is instead set via fermionic Higgs portal interactions, which are likewise constrained by naturalness considerations but parametrically weaker than those leading to dark matter annihilation. Finally, the predicted direct detection cross section is close to current LUX bounds and presents an opportunity for the next generation of direct detection experiments.

Authors:
 [1];  [2]
  1. Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theory Division; Univ. of Geneva (Switzerland). Dept. of Theoretical Physics and Center for Astroparticle Physics (CAP)
Publication Date:
Research Org.:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1437010
Grant/Contract Number:  
SC0014129
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 10; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; dark matter theory; particle physics - cosmology connection; cosmology of theories beyond the SM

Citation Formats

Craig, Nathaniel, and Katz, Andrey. The fraternal WIMP miracle. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/10/054.
Craig, Nathaniel, & Katz, Andrey. The fraternal WIMP miracle. United States. doi:https://doi.org/10.1088/1475-7516/2015/10/054
Craig, Nathaniel, and Katz, Andrey. Tue . "The fraternal WIMP miracle". United States. doi:https://doi.org/10.1088/1475-7516/2015/10/054. https://www.osti.gov/servlets/purl/1437010.
@article{osti_1437010,
title = {The fraternal WIMP miracle},
author = {Craig, Nathaniel and Katz, Andrey},
abstractNote = {We identify and analyze thermal dark matter candidates in the fraternal twin Higgs model and its generalizations. The relic abundance of fraternal twin dark matter is set by twin weak interactions, with a scale tightly tied to the weak scale of the Standard Model by naturalness considerations. As such, the dark matter candidates benefit from a "fraternal WIMP miracle'', reproducing the observed dark matter abundance for dark matter masses between 50 and 150 GeV . However, the couplings dominantly responsible for dark matter annihilation do not lead to interactions with the visible sector. The direct detection rate is instead set via fermionic Higgs portal interactions, which are likewise constrained by naturalness considerations but parametrically weaker than those leading to dark matter annihilation. Finally, the predicted direct detection cross section is close to current LUX bounds and presents an opportunity for the next generation of direct detection experiments.},
doi = {10.1088/1475-7516/2015/10/054},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 10,
volume = 2015,
place = {United States},
year = {2015},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 24 works
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Figures / Tables:

Figure 1 Figure 1: Bounds on v/f and the Higgs invisible branching ratio from a fit to current Higgs coupling measurements. The solid, dashed, and dotted black lines denote the 1-,2-, and 3-sigma bounds (defined as Δχ2 = 2.30, 6.18, and 11.83, respectively). The blue lines correspond to the contribution of Higgsmore » decays into $\hat{\tau}$ pairs as a function of v/f for $\hat{y}_{\tau}$ = 0, 1, 4. Here we neglect possible contributions from decays into twin bottoms, consistent with the freedom to have $\hat{y}_{b}$ ≃ 0, but include irreducible contributions from decays into twin gluons, assuming twin glueballs are kinematically accessible.« less

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